题目内容：

Jack has three black T-shirts.(对划线部分提问)
划线部分：three black T-shirts

优质解答

在哪里划线?
如果在three划线
答案：How many black T-shirts does Jack have?
如果在Jack下面划线
答案：Who has three black T-shirt?
如果在black T-shirt下面划线
答案:What does Jack has?